Knock-off guard for stop-motions.



J. T. HAGKING & c. WILKINso. y ""ff* KNOGK-OFF GUARD FOB STOP MOTIOES. A PfLIoATLoN rILBn sur. 1s. 190i. l

' 899,163, Patented sepa 22, 190s.

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' To all whom itma'y concern:

JOHN Tiros. IIAOKING, or ENFIELD, AND oHAIiLEs WILKINSON, OF PROVIDENCE, RHODE ISLAND.

Specification of Letters Patent.

Patented sept. 22, loos.

i Application filed September 18, 1907. Serial No. 393,435.vr

Be it known that we, JouxY Ti-ios. HACK- ixe and CHARLES WiLKiXsox, citizens of the United States, residing at Enfield, town of Smithfield, and Providence, respectively, in the county of Providence and State of Rhode Island, have invented cert-ain new and useful Improvements in Iinock- Oil' `Cniards for Stop-Motions, of which the following is a s ieoification, reference being had therein to t ie accompanying drawing.

This invention relates to knock-Ott guard for weft stop inotion for looms, and has for its object to rovide a simple and effective means where'y the usual stop motion is automatically prevented from working during the first stroke of the lay even though t-lie weft thread is not iii position to hold up the fork.

Iii O ur device the action of knocking oft' the shipper lever to sto i theloom is caused to move an auxiliary device to again raise the feeler fork and hold the. saine in its raised position unt-il the lay has inade another formatioally released and restored to its normal action.

In a loom, such asordinarily used for weaving woolen blankets and the like, the machine is necessarily very wide and heavy, the weft fork is placed in the middle of the lay and when the fork fails to engage a weft thread the loom of course is stopped-in the usual way, and in a looin of t-liis weight and extreme width considerable time and inanual labor is required in threading up and starting the saine again, which necessitates the throwing of the shuttle across the lay by hand, and then starting the heavy lay. In order to facilitate this work we have provided a simple attachment foi-automatically raising the fork and holding the same up until after the lay has completed its first stroke, which gives sufficient time for the shuttle to be thrown across the lay by the action of the. loom itself, thus saving inuch time and ren- `dering the work of starting unich lighter.

With these and other objects in view, the invention consist-s of certain novel features of construction, as will be more fully described a-iid particularly pointed out in the ap )ended claims..

n the. accompanying drawings: Figure l-is a front elevation showing a portion of the lay and the weft fork down and in position to Operate the mechanism to stop the loom. Fig. l-is a central sectional view of the saine. Fig. 3 is a front elevation illustrating the weft fork in its raised position and held in said position by our device. Fig. 'Lf-is a central sectional view showing the weft fork in its raised position. Fig. 5-is a plan view showing the stopping mechanism. Fig. G--is a detail illustrating our attachment showing the sliding cani in position under the fork finger.

Referring to the. drawings, at 1 is a portion of the usual Ylay to the front face of which is secured the plate In this plate the weft fork 3 is iivoted at 4-011 the lever 5. To the inner enr of this lever at 6, see Figs. 2 and 4, is pivotally connected the downwardly extending f'niger 7, which finger is rovided on its face with a cain portion 8, an( is also proA vided with a second extension or cam portion 9 on itslowcr end.. A

At 10 is a bar adapted to slide transversely on the plate 2 through the ears 11A-11. The upper edge of this bar is cut away termin a notch 12 into which the lower edge 13 of t ie cam portion 8 on the depending finger is adapted to catch. An inclined cani portion 14 is also formed on the edge of plate 10 for .the purpose of engaging the face of cam 8,

whereby the latter may be raised when rcquired.

DNITED Similis PATENTOFFIOE.

Beneath the breast beam, as illustrated in the dotted lines at 15 in Fig. 5, is a rod 16 adapted to slide endwisc in its bearing` 17 which is adapted to engage the shipper lever 19. At 2() is a connecting rod hooked at one end iii car 21 of the bar 10 and its opposite end is hooked into the collar 22 on said rod 16. In the ordinary action of the lay in beating up the cloth the rod 16 is held by friction against an eiidwisc movement and the bar 10 and lock the bar from a further eiidwise iiioi tion, whereby t-lie rod 16 will be forced to the left as the lay moves forward to knock ofi` the lever 1S) and stop the loom.

Our improved device is an attachment adapted to work-in conjunction with the above mechanism described in detail, or a l opportunity to be thrown across t-he lay and 60 i establish the weft thread m its proper posh,

`stop motion of similar construction, and con-A sists essentially of an ollsot bracketI 23 provided with slotted ears 2st-24 at either end .by which the same may be adjustablv secured by screws Z5-'25 to the front of tlie lay beneath the depending fork linger 7,. A pair of guide pins 126-26 are secured to this.

bracket and arranged to extend inwardly therefrom on which the cam plate 27 is hung. T-his cam 'plate is slotted at 2S and is adapted to slide endwise on said pins 2G-26- The upper edge of this plate is provided witha long slanting portion 2) which serves 'as a. cam to be forced under the fork linger '7 whereby the latter is carried upward Ato hold the fork in a raised position. To the lower edge of this eam plate is iixed a depending finger 30 through which said plate is moved baek and vforth on its supporting bracket. An outwardly extending push rod 31 is sup- )orted on the endwise movable rod 16 by the racket 32, and is adapted to engage the depending linger 30 and carry the cam portion 2Q under the finger 7 each time the rod 16 is moved to engage-the shipper and stop`the loom.

At 33 is a yieldable linger pivoted at 37 and hed against the stop pin 35 by means of the spring 36. This finger is offset at its end 37 so that after the cam plate has been earried along int-o its operative position by the push rod. 31 the next forward movement of the lay will cause this spring linger to engage the opposite side of the downwardly projecting end 30 and carry the cam back to its normal position again to again release the-fork to work in its usual way.

The operation of the device is further described as follows: The' device is readily attached to be operated in connection with the ordinary stop motion for this class of looms so that each time the fork fails to tind a thread andthe loom is stopped this little cam is automatically operated and passed under the fork finger to again raise the fork and hold it in its raised position until the lay has made another forward stroke, in which stroke the cam engages the yielding spring finger 33 and is carried back out of the way, leaving the fork to again act in its` normal capacity. By the use et this deviee it will be seen that the lay can make a complete backward and forward stroke in starting up without the necessity of there being a. weft ,thread in position to prevent the folk from falling to stop t-he loom again, allowing the attendant to place the shuttle in position at one end of the loom and give the same an tion after which the cam is removed and the lay continues to operate 1n the usual way.

Our dev1ce 1s extremely simple and mexpensive in its construction and eii'ective in its operation, and is so designed that it may be readily applied to and operated on any loom of this cl/iaracter.

Having thns described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. In a loom, a. weft fork, a lay, means for automatically stopping the loom when its fork fails to [ind the weftthread, a cam actuated by the movement of said stopping means to position said fork whereby the loom is prevented from heilig stopped on the next forward stroke of the lay, and means for withdrawing said cam to restore said fork lto its normal action.

2. V[n a loom, a stop mechanism including a weft fork, a lay, an automatically actuated transversely sliding cam plate adapted to be moved by said stopping mechanism to positien said fork whereby said mechanism is nevented from being actuated to stop the loom on the next forward stroke of the lay, and means for automatically withdrawing said cam plate to again allow said fork its normal action.

y 3. In a loom, a welt fork, a lay, a shipper lever, means including a shipper lever knockoil' rod for automatically stopping the loom when its fork fails 'to lind the weft thread, a trans\.'ersely sliding cam, means operated by said knoeksoll' rod to move said cam to hold up said fork whereby the loom is prevented from being stopped on the next forward stroke of' the lay.

4. In a loom, a. weft fork, a lay, a shipper lever, means including a shipper lever knockofl' rod for automatically stopping the loom when its fork fails to iind the weft thread, a. transversely sliding cam, means operated by said knock-oft' rod to move said cam to hold up said fork whereby the loom is prevented from heilig stopped on the next forward stroke of the lay, and a yieldable finger adapted toengage said cam to remove the same to restore said fork to its normal action.

ln testimony whereof we aiix our signatures in presence of two witnesses.

.ionx Tiros. naeKrxG. enanrrcs wrLKrNsox. 

